Cal. Rev. & Tax. Code § 20514
(b) With respect to assistance that is provided by the Franchise Tax Board pursuant to this chapter for the 2002 calendar year and each calendar year thereafter, the gross household income figure that applies to assistance provided by the Franchise Tax Board during that period shall be the gross household income figure that applied to assistance provided by the Franchise Tax Board in the same period in the immediately preceding year, multiplied by an inflation adjustment factor calculated as follows: